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    Method for producing optical fiber preform, and optical fiber
    151.
    发明专利
    Method for producing optical fiber preform, and optical fiber 有权
    制造光纤预制件的方法和光纤

    公开(公告)号：JP2010228933A

    公开(公告)日：2010-10-14

    申请号：JP2009075321

    申请日：2009-03-26

    Applicant: Fujikura Ltd ,  株式会社フジクラ

    Inventor： ICHII KENTARO ,  TANIGAWA SHOJI

    IPC: C03B37/014 ,  C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00 ,  H01S3/06

    CPC classification number: C03B37/01838 ,  C03B37/01853 ,  C03B2201/28 ,  C03B2201/36 ,  C03C13/046 ,  C03C23/0095 ,  C03C2201/28 ,  C03C2201/32 ,  C03C2201/3488 ,  C03C2201/36 ,  C03C2203/54 ,  H01S3/06716 ,  H01S3/06729

    Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber having a large effective cross-sectional area (A eff ), in which the concentration of a rare earth element is easily controlled and generation of a nonlinear optical effect is effectively suppressed in a fiber amplifier or a fiber laser, and to provide a method for producing an optical fiber preform suitable for the production of the optical fiber. SOLUTION: The method for producing an optical fiber preform in which a rare earth element is added into the core comprises: a step of depositing fine glass particles which are mainly composed of silicon dioxide within a quartz tube by a MCVD method; a step of adding the rare earth element and aluminum into the fine glass particles within the quartz tube by an immersion method; a step of heating the quartz tube while allowing a phosphorus-containing gas to flow into the quartz tube, so as to sinter the fine glass particles within the quartz tube while adding phosphorus thereinto; and a step of heating and collapsing the quartz tube, into which the rare earth element, the aluminum and the phosphorus have been added. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供一种具有大的有效截面积（A eff ）的光纤，其中容易控制稀土元素的浓度并产生非线性 在光纤放大器或光纤激光器中有效地抑制了光学效应，并且提供了一种适用于生产光纤的光纤预制棒的制造方法。 解决方案：将其中添加稀土元素的光纤预制品的制造方法包括：通过MCVD法在石英管内沉积主要由二氧化硅构成的微细玻璃颗粒的步骤; 通过浸渍法将稀土元素和铝添加到石英管内的微细玻璃颗粒中的步骤; 同时允许含磷气体流入石英管中的石英管的加热步骤，以便在加入磷的同时使石英管内的微细玻璃颗粒烧结; 以及添加稀土元素，铝和磷的石英管的加热塌缩的步骤。 版权所有（C）2011，JPO＆INPIT

    Producing method of preform, optical fiber added with rare earth element and optical fiber amplifier
    152.
    发明专利
    Producing method of preform, optical fiber added with rare earth element and optical fiber amplifier 有权
    制造预制件的方法，添加有稀土元素和光纤放大器的光纤

    公开(公告)号：JP2009167049A

    公开(公告)日：2009-07-30

    申请号：JP2008006074

    申请日：2008-01-15

    Applicant: Sumitomo Electric Ind Ltd ,  住友電気工業株式会社

    Inventor： HARUNA TETSUYA ,  ISHIKAWA MANABU

    IPC: C03B37/018 ,  H01S3/06 ,  H01S3/10

    CPC classification number: C03C3/06 ,  C03B37/01807 ,  C03B37/01853 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/36 ,  C03C4/12 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/28 ,  C03C2201/36 ,  C03C2203/44 ,  H01S3/06716 ,  H01S3/176

    Abstract: PROBLEM TO BE SOLVED: To provide a producing method and the like of a preform where the preform to produce a low-loss optical fiber added with a rare earth element and a P element can be produced efficiently. SOLUTION: The producing method of the preform comprises a first step to deposit glass containing P 2 O 5 on the inside wall of a quartz pipe and a second step to introduce a gas containing Cl 2 in the quartz pipe and to dehydrate the glass containing P 2 O 5 by heating the quartz pipe. The preform added with the rare earth element at a core part is produced by performing the first step and the second step alternately and repeatedly. In the producing method of the preform comprising further a third step to deposit glass not containing P 2 O 5 on the inside wall of the quartz pipe, it is favorable that the first step, the second step and the third step are performed repeatedly in this order and that glass containing the rare earth element and not containing P 2 O 5 is deposited on the inside wall of the quartz pipe in the third step. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供预成型件的制造方法等，可以有效地制造预成型体，以生产添加有稀土元素和P元素的低损耗光纤。 解决方案：预型件的制造方法包括在石英管的内壁上沉积含有P O 5 的玻璃的第一步骤，并将第二步骤 在石英管中引入含有Cl 2 的气体，并通过加热石英管使含有P 2 O 5 的玻璃脱水。 在核心部分添加有稀土元素的预成型件通过交替地重复地进行第一步骤和第二步骤来制造。 在预成形坯的制造方法中，还具有在石英管的内壁上沉积不含P O 5 的玻璃的第三工序，所以优选的是， 步骤，第二步骤和第三步骤按顺序重复进行，并且含有稀土元素并且不含P O 5 的玻璃沉积在内壁上 的石英管在第三步。 版权所有（C）2009，JPO＆INPIT

    Optical element
    155.
    发明专利
    Optical element 审中-公开

    公开(公告)号：JP2004021089A

    公开(公告)日：2004-01-22

    申请号：JP2002178470

    申请日：2002-06-19

    Applicant: Asahi Glass Co Ltd ,  旭硝子株式会社

    Inventor： KOIKE AKIO ,  SUGIMOTO NAOKI

    IPC: G02B5/28 ,  C03C3/06 ,  G02B5/18 ,  G02B6/02 ,  G02B6/10

    CPC classification number: C03C3/06 ,  C03C2201/12 ,  C03C2201/14 ,  C03C2201/28 ,  C03C2201/32 ,  C03C2201/42

    Abstract: PROBLEM TO BE SOLVED: To provide an optical element having glass not containing alkali metal oxides as essential components and ensuring a small change in light path due to temperature changes as a component. SOLUTION: The optical element is used for light of 450-1,700 nm wavelength and has glass through which the light should propagate as a component or comprises glass through which the light should propagate, wherein dS/dT(=dn/dT+nα) expressed using the refractive index n of the glass to light of 1,550 nm wavelength, the rate dn/dT of temperature change of n at 25°C and the coefficient α of linear expansion at 25°C is ≤8.9×10 -6 /°C and the glass contains ≤1 mass% alkali metal oxides. COPYRIGHT: (C)2004,JPO

    Silica core optical fiber for maintaining plane of polarization
    157.
    发明专利
    Silica core optical fiber for maintaining plane of polarization 失效
    用于维护极化平面的硅芯芯光纤

    公开(公告)号：JPS59178409A

    公开(公告)日：1984-10-09

    申请号：JP5429883

    申请日：1983-03-30

    Applicant: Hitachi Cable Ltd

    Inventor： KATOU MASAAKI ,  MIKOSHIBA KOUICHI

    IPC: C03B37/012 ,  C03C13/04 ,  G02B6/024 ,  G02B6/10

    CPC classification number: G02B6/105 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/10 ,  C03C2201/28

    Abstract: PURPOSE:To provide a low loss and good resistance to radiation by specifying the respective refractive indices of a core, clad and elliptical jacket and the size in the prescribed part at specific values and forming the clad of silica glass contg. fluorine, P2O5 and B2O3. CONSTITUTION:An optical fiber for maintaining plane of polarization has the relation expressed by the inequality I where the respective refractive indices of a core 21, a clad 22 and an elliptical jacket 23 are designated as n1, n2, n3 and has the relation expressed by the inequality II where the radius of the core is designated as T, the thickness of the clad as delta1T, and the total min. thickness of the clad and the elliptical jacket as delta2T. Such relations are obtd. by forming the core 21 and the support 24 of high purity silica, making the clad 22 into the constitution consisting essentially of SiO2 and contg. fluorine, P2O5 and B2O3 and making the jacket 23 into the constitution consisting essentially of SiO2 and contg. P2O5 and B2O3. A low loss and good resistance to radiation are thus obtd.

    Abstract translation: 目的：通过指定芯，包层和椭圆形夹套的相应折射率和规定部分的特定值的尺寸，形成二氧化硅玻璃的包层，从而提供低损耗和良好的耐辐射性。 氟，P 2 O 5和B 2 O 3。 构成：用于维持偏振面的光纤具有由芯21，包层22和椭圆形护套23的折射率指定为n1，n2，n3的不等式I表示的关系，并且具有由 其中芯的半径被指定为T，包层厚度为delta1T的不等式II和总分。 包层和椭圆形外套的厚度为Δ2T。 这种关系是有道理的。 通过形成高纯度二氧化硅的芯21和支撑体24，使得包层22成为基本上由SiO 2组成的结构。 氟，P 2 O 5和B 2 O 3，并将夹套23制成基本上由SiO2组成的结构。 P2O5和B2O3。 因此，低损耗和良好的耐辐射性得到了证实。

    YTTERBIUM-DOPED OPTICAL FIBER
    159.
    发明公开
    YTTERBIUM-DOPED OPTICAL FIBER 审中-公开
    掺镱的光纤

    公开(公告)号：EP2348587A1

    公开(公告)日：2011-07-27

    申请号：EP09824607.7

    申请日：2009-11-04

    Applicant: Fujikura, Ltd.

    Inventor： ICHII, Kentaro ,  TANIGAWA, Shoji ,  ARAI, Tomofumi

    IPC: H01S3/06

    CPC classification number: H01S3/06716 ,  C03C2201/28 ,  H01S3/06733 ,  H01S3/06754 ,  H01S3/1618 ,  H01S3/1693 ,  H01S3/175 ,  H01S3/302

    Abstract: An ytterbium-doped optical fiber including a core containing at least ytterbium, aluminum and phosphorous and a clad surrounding the core, wherein a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core is equal to a molar concentration of aluminum oxide with respect to aluminum in the core, wherein a ratio of a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core to the molar concentration of ytterbium oxide with respect to ytterbium in the core is higher than or equal to 10 and lower than or equal to 30, and wherein a relative refractive index difference between the core and the clad is higher than or equal to 0.05% and lower than or equal to 0.30%.

    Abstract translation: 1。一种掺镱光纤，其特征在于，包含至少含有镱，铝和磷的核以及包围所述核的包层，所述核中的五氧化二磷的摩尔浓度相对于氧化铝的摩尔浓度 其中核中的五氧化二磷的摩尔浓度相对于核中的磷的摩尔浓度与氧化镱相对于核中的镱的摩尔浓度之比高于或等于10且小于或等于30 并且其中所述芯与所述包层之间的相对折射率差大于或等于0.05％并且小于或等于0.30％。

    Doped rare earth and large effective area optical fibers for fiber lasers and amplifiers
    160.
    发明公开
    Doped rare earth and large effective area optical fibers for fiber lasers and amplifiers 有权
    稀土掺杂光纤和光纤大有效面积光纤激光器和放大器

    公开(公告)号：EP2292566A2

    公开(公告)日：2011-03-09

    申请号：EP10191210.3

    申请日：2007-06-29

    Applicant: IMRA America, Inc.

    Inventor： Dong, Liang ,  Peng, Xiang

    IPC: C03C3/06 ,  C03C3/097 ,  C03C13/04 ,  C03C4/00 ,  C03B37/00

    CPC classification number: G02B6/03616 ,  C03B37/01217 ,  C03B37/0122 ,  C03B37/01838 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2203/14 ,  C03B2203/23 ,  C03B2203/30 ,  C03B2203/42 ,  C03C3/06 ,  C03C3/097 ,  C03C4/0071 ,  C03C13/046 ,  C03C2201/10 ,  C03C2201/28 ,  C03C2201/34 ,  C03C2201/3488 ,  G02B6/024 ,  G02B6/032 ,  G02B6/03622 ,  G02B6/03633 ,  G02B6/03638 ,  H01S3/06712 ,  H01S3/06716 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/1618

    Abstract: The present invention relates to a large-core optical fiber and a large-core optical fiber system, wherein the optical fiber comprises of a core having a core raidius ρ and a core index of refraction n core ; a first cladding disposed about said core, said first cladding having an outer radius ρ 1 and an index of refraction n cl , said core and said first cladding having a difference in index of refraction Δn = n core - n cl , and a numerical aperture (NA) less than about 0.05, said NA determined by n core and n cl ; and a second cladding disposed about said first cladding, said first cladding and said second cladding having a difference in index of refraction Δn 1 , wherein the first cladding radius ρ 1 is greater than about 1.1 ρ and less than about 2 ρ and the refractive index difference between said first cladding and said second cladding, Δn 1 , is greater than about 1.5 Δn and less than about 50 Δn. The optical fiber system for providing optical amplification consists of the large-core optical fiber, wherein said core of said large-core fiber is doped with one or more types of rare earth ions, said large-core optical fiber comprising of a combined waveguide formed by said core and said first cladding layer; an optical pump optically coupled to said large-core optical fiber; and an optical source optically coupled to an input of said large-core optical fiber.

    Abstract translation: 本发明涉及一种大芯光纤和大芯光纤系统，worin芯的光纤包括具有芯raidius A和折射率n芯的芯指数; 第一包层置于所述芯，所述具有outerRadius A 1和折射率n的CL，所述芯和具有折射率的差。所述第一包层的折射率的第一包层“N = N核心 - N的CL，和数值 孔径（NA）大于约12:05以下，说NA测定用n芯和n CL; 和第二包层置于所述第一包，所述第一包层和所述的第二包层的折射率的差的“n 1，worin第一包层的半径，A 1为大于约2a和折射率大于约1.1且小于 说第一包层和第二包层说，的折射率之差的“n 1，大于约1.5”大于约50的“n秒和更少。 对于大芯光纤的提供光学放大besteht光纤系统，worin所述大芯光纤的芯掺杂有一种或多种类型的稀土离子，所述大芯光纤包括组合的波导形成 由所述芯和所述第一包层; 到光学耦合到所述大芯光纤光泵浦; 和光源光学在所述大芯光纤的输入端耦合到。

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